RE: [gtkmm] Reset a value in a cell

[Murray Cumming Comneon com]

> From: Igor Gorbounov [mailto:igorbounov voronezh serw ru] 
> Murray Cumming Comneon com wrote:
> 
> >>From: Igor Gorbounov [mailto:igorbounov voronezh serw ru] 
> >>Hi, All!
> >>[...]
> >>
> >Can you just read the default value at runtime and then use 
> it later? I
> >don't think there's a better way, though you could ask on 
> the GTK+ list
> >about default property values in general.
> >  
> >
> There is a file (filetree.cc) by Daniel Elstner, distributed as an 
> example in
> this mail list,

If you can show us a URL for that then we might be able to think about it
more.

> and it has a line:
> "renderer.property_foreground_gdk().reset_value();"
> so I've thought there might be a magic way to reset the value 
> of a cell
> of any datatype.
>     Igor Gorbounov

Hmm, yes. I don't know how or when that should be used. I suspect that it
just sets things to zero, or whatever is an appropriate "initialized" value
for that _type_ of property, rather than for that specific property.

Here is the chain of my investigations:
http://cvs.gnome.org/lxr/source/gtkmm-root/glib-src/propertyproxy.h#43
http://cvs.gnome.org/lxr/source/gtkmm-root/glib-src/propertyproxy_base.cc#14
0
http://cvs.gnome.org/lxr/source/gtkmm-root/glib-src/value.cc#37
http://developer.gnome.org/doc/API/2.0/gobject/gobject-Generic-values.html#g
-value-init

Murray Cumming
murrayc usa net
www.murrayc.com